Can you genetically engineer something to tolerate droughts




















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Wheat has a complex hexaploid allopolyploidy genome structure. Therefore, future breeding and genetic transformation efforts require the complete information of functional genomics and identification of the functional and structural role of genes involved in tolerance and determining higher grain yield. Some potential genes have been discovered which have not yet been tested in wheat and could be targeted to improve drought tolerance and yield.

These potential genes are responsible for allocating sucrose during seed development, recovering from drought stress at the vegetative stage, and signaling genes involved in plant growth regulations. Research is being undergone in Mexico by the International Maize and Wheat Improvement Centre in which genetically-modified wheat inserted with these genes will be studied, and the yield will be determined under drought. Furthermore, genetic variations in wheat genotypes for sucrose allocation will be focused.

Hopefully, the new developed drought-tolerant varieties will soon be developed and deployed through exchanging knowledge between research institutes and industries. These approaches could provide a more favorable potential base for future wheat-breeding programs by effective collaboration with traditional breeders. By collaboration and successful introgression of these genetic techniques, the outcome could be translated from laboratory tools to fields.

National Center for Biotechnology Information , U. Int J Mol Sci. Published online Jul 8. Author information Article notes Copyright and License information Disclaimer. Received Jun 13; Accepted Jul 5. This article has been cited by other articles in PMC. Abstract Crop yield improvement is necessary to keep pace with increasing demand for food. Keywords: genetic modification, Triticum aestivum L.

Introduction Bread wheat Triticum aestivum L. Osmoprotectants, Metabolites and Protective Genes These osmoprotectants are the favorite targets for genetic engineering and many crops are genetically engineered using osmoprotectants, like glycine betaine, mannitol, and trehalose to increase tolerance by protecting important macromolecules.

Proline Proline is a well-known proteogenic amino acid which acts as a compatible osmoprotectant and accumulates under osmotic stress to protect cellular structure and function [ 22 , 23 ]. Glycine Betaine Glycine betaine is a quaternary ammonium compound and is known to have a protective role against drought stress by maintaining osmotic balance and protecting quaternary structures of proteins [ 29 ].

Mannitols Mannitol is sugar-alcohol, which serves as a major carbon source and has a role in osmoregulation as a coenzyme regulator and scavenging of reactive oxygen species. Transporters Genes Transporters genes play an important role in restoring ionic homeostasis under stress. Carbon Metabolism Transforming C 4 enzymes genes is also a promising approach to increasing the yield and photosynthesis rate of C 3 plants like wheat.

Transcription Factors Plants induce the expression of various transcription factors to cope with environmental stresses. DREB Dehydration-responsive element binding DREB transcription factors have been reported to enhance drought tolerance in transgenic wheat [ 62 , 63 ]. TaSHN1 Cuticle protects plant from various abiotic and biotic stresses and from water loss. Post-Translational Modification Post-translational modification of small ubiquitin-like modifiers SUMOylation is an important mechanism and regulates plant growth and development under stress conditions [ 9 , 83 ].

Protein Kinase 8. Phosphoenolpyruvate Carboxylase Kinase Related Kinases Protein kinases regulate key aspects of cellular function, including responses to external signals [ 87 ].

Nuclear Factor Nuclear factor Y NF-Y gene family is involved in various regulatory functions for plant development and performance under stress [ 92 ]. Table 1 Improving drought tolerance of wheat through engineering gene. Cadenza Sunflower Increased yield and water use efficiency. Open in a separate window. Limitations Progress for successful development of drought-resistant wheat depends on the knowledge of functional genomics.

Future Directions in the Development of Drought-Tolerant Transgenic Wheat Genetic modification is a promising approach which gives us an insight into the regulatory mechanism by a genetic change of a single or few genes. Conflicts of Interest The authors declare no conflict of interest. References 1. Senapati N.

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